2124809778 has 32 divisors (see below), whose sum is σ = 5230302336. Its totient is φ = 560389248.

The previous prime is 2124809747. The next prime is 2124809779. The reversal of 2124809778 is 8779084212.

It is not an unprimeable number, because it can be changed into a prime (2124809779) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1945251 + ... + 1946342.

It is an arithmetic number, because the mean of its divisors is an integer number (163446948).

Almost surely, 2^2124809778 is an apocalyptic number.

2124809778 is an abundant number, since it is smaller than the sum of its proper divisors (3105492558).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2124809778 is a wasteful number, since it uses less digits than its factorization.

2124809778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3891618.

The product of its (nonzero) digits is 451584, while the sum is 48.

The square root of 2124809778 is about 46095.6589930115. The cubic root of 2124809778 is about 1285.6024322764.

The spelling of 2124809778 in words is "two billion, one hundred twenty-four million, eight hundred nine thousand, seven hundred seventy-eight".